//------------------------------------------------------------------------------ 
//      Copyright (c) 2007, Be Nanashi-San 
// 
//      Permission is hereby granted, free of charge, to any person obtaining a 
//      copy of this software and associated documentation files (the "Software"), 
//      to deal in the Software without restriction, including without limitation 
//      the rights to use, copy, modify, merge, publish, distribute, sublicense, 
//      and/or sell copies of the Software, and to permit persons to whom the 
//      Software is furnished to do so, subject to the following conditions: 
// 
//      The above copyright notice and this permission notice shall be included in 
//      all copies or substantial portions of the Software. 
// 
//      THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
//      IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
//      FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
//      AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
//      LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
//      FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
//      DEALINGS IN THE SOFTWARE. 
// 
//      File Name:		History.cpp
//      Author		 	Be Nanashi-San 
//      Description: 	Thread viewing history management class	 
//------------------------------------------------------------------------------
#ifndef HISTORY_H_INCLUDED
#define HISTORY_H_INCLUDED

class BMessage;

class History {
public:
	History(int32 maxsize);
	~History();
	BMessage *Back();
	BMessage *Forward();
	bool CanBack();
	bool CanForward();
	void Add(const BMessage &);
	BMessage *At(int32 pos);
	int32 Size();
	int32 Capacity();
//	void Load();
//	void Save();

private:
	BMessage *fBuf;
	int32 fCurPointer;
	int32 fStart;
	int32 fEnd;
	int32 fSize;
	int32 fMaxSize;
};

#endif //HISTORY_H_INCLUDED